摘要
高压输电线覆冰是电网安全运行管理维护部门关注的重点致灾因子之一,其中覆冰厚度是输电线路风险评估、除冰策略等研究的关键指标。针对现有覆冰厚度提取精度不高、效率低等不足,提出了一种基于激光点云的高压输电线覆冰厚度反演方法,即模型-应力-冰厚法。首先从两期激光点云中精细提取输电线三维空间模型,结合导线参数提取空载输电线水平应力。然后根据状态方程,计算覆冰输电线水平应力。最后综合覆冰输电线三维空间模型和水平应力,计算其综合比载,最终实现覆冰平均厚度快速反演。实验结果表明:该方法能快速实现输电线覆冰厚度反演,覆冰厚度反演误差最大值为0.30 mm,相对误差为6.58%。该研究对高压输电线路覆冰风险监测与评估具有重要的应用价值。
The icing of high voltage transmission lines is one of the key disaster factors for the safe operation,management and maintenance department of a power grid,and icing thickness is the key index of risk assessment and deicing strategy.In view of the low accuracy and efficiency of the existing ice thickness extraction methods,a laser point cloud inversion method for ice thickness is proposed.First,the three-dimensional spatial model of the transmission line is extracted from a two-stage laser point cloud,and the horizontal stress of the no-load transmission line is extracted by combining the line parameters.Secondly,the horizontal stress of the ice-covered line is calculated according to the state equation.Finally,a three-dimensional spatial model and the horizontal stress of the ice-covered transmission line are integrated,and the comprehensive specific load is calculated,so as to realize fast inversion of the average ice thickness.Experimental results show that this method can quickly realize the inversion of the ice thickness.The maximum inversion error of ice thickness is 0.30 mm,and the relative error is 6.58%.The research has important application value for ice risk monitoring and evaluation of high-voltage transmission lines.
作者
麻卫峰
王成
王金亮
麻源源
张建鹏
MA Weifeng;WANG Cheng;WANG Jinliang;MA Yuanyuan;ZHANG Jianpeng(College of Tourism and Geographic Sciences,Yunnan Normal University,Kunming 650500,China;Key Laboratory of Resources and Environmental Remote Sensing for Universities in Yunnan,Kunming 650500,China;Center for Geospatial Information Engineering and Technology of Yunnan Province,Kunming 650500,China;Key Laboratory of Digital Earth Science,Aerospace Information Research Institute,Chinese Academy of Sciences,Beijing 100094,China;Chinese Antarctic Center of Surveying and Mapping,Wuhan University,Wuhan 430079,China)
出处
《电力系统保护与控制》
CSCD
北大核心
2021年第4期89-95,共7页
Power System Protection and Control
基金
国家重点研发计划项目资助(2018YFE0184300)
国家自然科学基金项目资助(41961060,41271230)。
关键词
无人机
激光点云
高压输电线路
等值覆冰厚度
UAV
laser point cloud
high voltage transmission line
equivalent ice thickness
